1 /* This module handles expression trees.
2 Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005
4 Free Software Foundation, Inc.
5 Written by Steve Chamberlain of Cygnus Support <sac@cygnus.com>.
7 This file is part of GLD, the Gnu Linker.
9 GLD is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 GLD is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GLD; see the file COPYING. If not, write to the Free
21 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
24 /* This module is in charge of working out the contents of expressions.
26 It has to keep track of the relative/absness of a symbol etc. This
27 is done by keeping all values in a struct (an etree_value_type)
28 which contains a value, a section to which it is relative and a
41 #include "libiberty.h"
42 #include "safe-ctype.h"
44 static void exp_fold_tree_1 (etree_type *);
45 static void exp_fold_tree_no_dot (etree_type *);
46 static bfd_vma align_n (bfd_vma, bfd_vma);
48 segment_type *segments;
50 struct ldexp_control expld;
52 /* Print the string representation of the given token. Surround it
53 with spaces if INFIX_P is TRUE. */
56 exp_print_token (token_code_type code, int infix_p)
90 { SECTIONS, "SECTIONS" },
91 { SIZEOF_HEADERS, "SIZEOF_HEADERS" },
93 { DEFINED, "DEFINED" },
94 { TARGET_K, "TARGET" },
95 { SEARCH_DIR, "SEARCH_DIR" },
101 { LOADADDR, "LOADADDR" },
103 { REL, "relocatable" },
104 { DATA_SEGMENT_ALIGN, "DATA_SEGMENT_ALIGN" },
105 { DATA_SEGMENT_RELRO_END, "DATA_SEGMENT_RELRO_END" },
106 { DATA_SEGMENT_END, "DATA_SEGMENT_END" },
107 { ORIGIN, "ORIGIN" },
108 { LENGTH, "LENGTH" },
109 { SEGMENT_START, "SEGMENT_START" }
113 for (idx = 0; idx < ARRAY_SIZE (table); idx++)
114 if (table[idx].code == code)
118 fputc (' ', config.map_file);
120 if (idx < ARRAY_SIZE (table))
121 fputs (table[idx].name, config.map_file);
123 fputc (code, config.map_file);
125 fprintf (config.map_file, "<code %d>", code);
128 fputc (' ', config.map_file);
134 expld.result.value += expld.result.section->vma;
135 expld.result.section = bfd_abs_section_ptr;
139 new_abs (bfd_vma value)
141 expld.result.valid_p = TRUE;
142 expld.result.section = bfd_abs_section_ptr;
143 expld.result.value = value;
144 expld.result.str = NULL;
148 exp_intop (bfd_vma value)
150 etree_type *new = stat_alloc (sizeof (new->value));
151 new->type.node_code = INT;
152 new->value.value = value;
153 new->value.str = NULL;
154 new->type.node_class = etree_value;
159 exp_bigintop (bfd_vma value, char *str)
161 etree_type *new = stat_alloc (sizeof (new->value));
162 new->type.node_code = INT;
163 new->value.value = value;
164 new->value.str = str;
165 new->type.node_class = etree_value;
169 /* Build an expression representing an unnamed relocatable value. */
172 exp_relop (asection *section, bfd_vma value)
174 etree_type *new = stat_alloc (sizeof (new->rel));
175 new->type.node_code = REL;
176 new->type.node_class = etree_rel;
177 new->rel.section = section;
178 new->rel.value = value;
183 new_rel (bfd_vma value, char *str, asection *section)
185 expld.result.valid_p = TRUE;
186 expld.result.value = value;
187 expld.result.str = str;
188 expld.result.section = section;
192 new_rel_from_abs (bfd_vma value)
194 expld.result.valid_p = TRUE;
195 expld.result.value = value - expld.section->vma;
196 expld.result.str = NULL;
197 expld.result.section = expld.section;
201 fold_unary (etree_type *tree)
203 exp_fold_tree_1 (tree->unary.child);
204 if (expld.result.valid_p)
206 switch (tree->type.node_code)
209 if (expld.phase != lang_first_phase_enum)
210 new_rel_from_abs (align_n (expld.dot, expld.result.value));
212 expld.result.valid_p = FALSE;
221 expld.result.value = ~expld.result.value;
226 expld.result.value = !expld.result.value;
231 expld.result.value = -expld.result.value;
235 /* Return next place aligned to value. */
236 if (expld.phase != lang_first_phase_enum)
239 expld.result.value = align_n (expld.dot, expld.result.value);
242 expld.result.valid_p = FALSE;
245 case DATA_SEGMENT_END:
246 if (expld.phase != lang_first_phase_enum
247 && expld.section == bfd_abs_section_ptr
248 && (expld.dataseg.phase == exp_dataseg_align_seen
249 || expld.dataseg.phase == exp_dataseg_relro_seen
250 || expld.dataseg.phase == exp_dataseg_adjust
251 || expld.dataseg.phase == exp_dataseg_relro_adjust
252 || expld.phase == lang_final_phase_enum))
254 if (expld.dataseg.phase == exp_dataseg_align_seen
255 || expld.dataseg.phase == exp_dataseg_relro_seen)
257 expld.dataseg.phase = exp_dataseg_end_seen;
258 expld.dataseg.end = expld.result.value;
262 expld.result.valid_p = FALSE;
273 fold_binary (etree_type *tree)
275 exp_fold_tree_1 (tree->binary.lhs);
277 /* The SEGMENT_START operator is special because its first
278 operand is a string, not the name of a symbol. */
279 if (expld.result.valid_p && tree->type.node_code == SEGMENT_START)
281 const char *segment_name;
283 /* Check to see if the user has overridden the default
285 segment_name = tree->binary.rhs->name.name;
286 for (seg = segments; seg; seg = seg->next)
287 if (strcmp (seg->name, segment_name) == 0)
290 expld.result.value = seg->value;
291 expld.result.str = NULL;
292 expld.result.section = NULL;
296 else if (expld.result.valid_p)
298 etree_value_type lhs = expld.result;
300 exp_fold_tree_1 (tree->binary.rhs);
301 if (expld.result.valid_p)
303 /* If the values are from different sections, or this is an
304 absolute expression, make both the source arguments
305 absolute. However, adding or subtracting an absolute
306 value from a relative value is meaningful, and is an
308 if (expld.section != bfd_abs_section_ptr
309 && lhs.section == bfd_abs_section_ptr
310 && tree->type.node_code == '+')
312 /* Keep the section of the rhs term. */
313 expld.result.value = lhs.value + expld.result.value;
316 else if (expld.section != bfd_abs_section_ptr
317 && expld.result.section == bfd_abs_section_ptr
318 && (tree->type.node_code == '+'
319 || tree->type.node_code == '-'))
321 /* Keep the section of the lhs term. */
322 expld.result.section = lhs.section;
324 else if (expld.result.section != lhs.section
325 || expld.section == bfd_abs_section_ptr)
328 lhs.value += lhs.section->vma;
331 switch (tree->type.node_code)
334 if (expld.result.value != 0)
335 expld.result.value = ((bfd_signed_vma) lhs.value
336 % (bfd_signed_vma) expld.result.value);
337 else if (expld.phase != lang_mark_phase_enum)
338 einfo (_("%F%S %% by zero\n"));
342 if (expld.result.value != 0)
343 expld.result.value = ((bfd_signed_vma) lhs.value
344 / (bfd_signed_vma) expld.result.value);
345 else if (expld.phase != lang_mark_phase_enum)
346 einfo (_("%F%S / by zero\n"));
351 expld.result.value = lhs.value y expld.result.value; \
372 if (lhs.value > expld.result.value)
373 expld.result.value = lhs.value;
377 if (lhs.value < expld.result.value)
378 expld.result.value = lhs.value;
382 expld.result.value = align_n (lhs.value, expld.result.value);
385 case DATA_SEGMENT_ALIGN:
386 if (expld.phase != lang_first_phase_enum
387 && expld.section == bfd_abs_section_ptr
388 && (expld.dataseg.phase == exp_dataseg_none
389 || expld.dataseg.phase == exp_dataseg_adjust
390 || expld.dataseg.phase == exp_dataseg_relro_adjust
391 || expld.phase == lang_final_phase_enum))
393 bfd_vma maxpage = lhs.value;
394 bfd_vma commonpage = expld.result.value;
396 expld.result.value = align_n (expld.dot, maxpage);
397 if (expld.dataseg.phase == exp_dataseg_relro_adjust)
398 expld.result.value = expld.dataseg.base;
399 else if (expld.dataseg.phase != exp_dataseg_adjust)
401 expld.result.value += expld.dot & (maxpage - 1);
402 if (expld.phase == lang_allocating_phase_enum)
404 expld.dataseg.phase = exp_dataseg_align_seen;
405 expld.dataseg.min_base = align_n (expld.dot, maxpage);
406 expld.dataseg.base = expld.result.value;
407 expld.dataseg.pagesize = commonpage;
408 expld.dataseg.maxpagesize = maxpage;
409 expld.dataseg.relro_end = 0;
412 else if (commonpage < maxpage)
413 expld.result.value += ((expld.dot + commonpage - 1)
414 & (maxpage - commonpage));
417 expld.result.valid_p = FALSE;
420 case DATA_SEGMENT_RELRO_END:
421 if (expld.phase != lang_first_phase_enum
422 && (expld.dataseg.phase == exp_dataseg_align_seen
423 || expld.dataseg.phase == exp_dataseg_adjust
424 || expld.dataseg.phase == exp_dataseg_relro_adjust
425 || expld.phase == lang_final_phase_enum))
427 if (expld.dataseg.phase == exp_dataseg_align_seen
428 || expld.dataseg.phase == exp_dataseg_relro_adjust)
429 expld.dataseg.relro_end = lhs.value + expld.result.value;
431 if (expld.dataseg.phase == exp_dataseg_relro_adjust
432 && (expld.dataseg.relro_end
433 & (expld.dataseg.pagesize - 1)))
435 expld.dataseg.relro_end += expld.dataseg.pagesize - 1;
436 expld.dataseg.relro_end &= ~(expld.dataseg.pagesize - 1);
437 expld.result.value = (expld.dataseg.relro_end
438 - expld.result.value);
441 expld.result.value = lhs.value;
443 if (expld.dataseg.phase == exp_dataseg_align_seen)
444 expld.dataseg.phase = exp_dataseg_relro_seen;
447 expld.result.valid_p = FALSE;
455 expld.result.valid_p = FALSE;
460 fold_trinary (etree_type *tree)
462 exp_fold_tree_1 (tree->trinary.cond);
463 if (expld.result.valid_p)
464 exp_fold_tree_1 (expld.result.value
466 : tree->trinary.rhs);
470 fold_name (etree_type *tree)
472 memset (&expld.result, 0, sizeof (expld.result));
474 switch (tree->type.node_code)
477 if (expld.phase != lang_first_phase_enum)
479 bfd_vma hdr_size = 0;
480 /* Don't find the real header size if only marking sections;
481 The bfd function may cache incorrect data. */
482 if (expld.phase != lang_mark_phase_enum)
483 hdr_size = bfd_sizeof_headers (output_bfd, link_info.relocatable);
488 if (expld.phase == lang_first_phase_enum)
489 lang_track_definedness (tree->name.name);
492 struct bfd_link_hash_entry *h;
494 = lang_symbol_definition_iteration (tree->name.name);
496 h = bfd_wrapped_link_hash_lookup (output_bfd, &link_info,
499 expld.result.value = (h != NULL
500 && (h->type == bfd_link_hash_defined
501 || h->type == bfd_link_hash_defweak
502 || h->type == bfd_link_hash_common)
503 && (def_iteration == lang_statement_iteration
504 || def_iteration == -1));
505 expld.result.section = bfd_abs_section_ptr;
506 expld.result.valid_p = TRUE;
510 if (expld.phase == lang_first_phase_enum)
512 else if (tree->name.name[0] == '.' && tree->name.name[1] == 0)
513 new_rel_from_abs (expld.dot);
516 struct bfd_link_hash_entry *h;
518 h = bfd_wrapped_link_hash_lookup (output_bfd, &link_info,
522 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n"));
523 else if (h->type == bfd_link_hash_defined
524 || h->type == bfd_link_hash_defweak)
526 if (bfd_is_abs_section (h->u.def.section))
527 new_abs (h->u.def.value);
530 asection *output_section;
532 output_section = h->u.def.section->output_section;
533 if (output_section == NULL)
535 if (expld.phase != lang_mark_phase_enum)
536 einfo (_("%X%S: unresolvable symbol `%s'"
537 " referenced in expression\n"),
541 new_rel (h->u.def.value + h->u.def.section->output_offset,
542 NULL, output_section);
545 else if (expld.phase == lang_final_phase_enum
546 || expld.assigning_to_dot)
547 einfo (_("%F%S: undefined symbol `%s' referenced in expression\n"),
549 else if (h->type == bfd_link_hash_new)
551 h->type = bfd_link_hash_undefined;
552 h->u.undef.abfd = NULL;
553 if (h->u.undef.next == NULL && h != link_info.hash->undefs_tail)
554 bfd_link_add_undef (link_info.hash, h);
560 if (expld.phase != lang_first_phase_enum)
562 lang_output_section_statement_type *os;
564 os = lang_output_section_find (tree->name.name);
565 if (os != NULL && os->processed)
566 new_rel (0, NULL, os->bfd_section);
571 if (expld.phase != lang_first_phase_enum)
573 lang_output_section_statement_type *os;
575 os = lang_output_section_find (tree->name.name);
576 if (os != NULL && os->processed)
578 if (os->load_base == NULL)
579 new_rel (0, NULL, os->bfd_section);
581 exp_fold_tree_1 (os->load_base);
587 if (expld.phase != lang_first_phase_enum)
589 int opb = bfd_octets_per_byte (output_bfd);
590 lang_output_section_statement_type *os;
592 os = lang_output_section_find (tree->name.name);
595 else if (os->processed)
596 new_abs (os->bfd_section->size / opb);
602 lang_memory_region_type *mem;
604 mem = lang_memory_region_lookup (tree->name.name, FALSE);
606 new_abs (mem->length);
608 einfo (_("%F%S: undefined MEMORY region `%s'"
609 " referenced in expression\n"), tree->name.name);
615 lang_memory_region_type *mem;
617 mem = lang_memory_region_lookup (tree->name.name, FALSE);
619 new_abs (mem->origin);
621 einfo (_("%F%S: undefined MEMORY region `%s'"
622 " referenced in expression\n"), tree->name.name);
633 exp_fold_tree_1 (etree_type *tree)
637 memset (&expld.result, 0, sizeof (expld.result));
641 switch (tree->type.node_class)
644 new_rel (tree->value.value, tree->value.str, expld.section);
648 if (expld.phase != lang_first_phase_enum)
650 asection *output_section = tree->rel.section->output_section;
651 new_rel (tree->rel.value + tree->rel.section->output_offset,
652 NULL, output_section);
655 memset (&expld.result, 0, sizeof (expld.result));
659 exp_fold_tree_1 (tree->assert_s.child);
660 if (expld.phase == lang_final_phase_enum && !expld.result.value)
661 einfo ("%X%P: %s\n", tree->assert_s.message);
679 if (tree->assign.dst[0] == '.' && tree->assign.dst[1] == 0)
681 /* Assignment to dot can only be done during allocation. */
682 if (tree->type.node_class != etree_assign)
683 einfo (_("%F%S can not PROVIDE assignment to location counter\n"));
684 if (expld.phase == lang_mark_phase_enum
685 || expld.phase == lang_allocating_phase_enum
686 || (expld.phase == lang_final_phase_enum
687 && expld.section == bfd_abs_section_ptr))
689 /* Notify the folder that this is an assignment to dot. */
690 expld.assigning_to_dot = TRUE;
691 exp_fold_tree_1 (tree->assign.src);
692 expld.assigning_to_dot = FALSE;
694 if (!expld.result.valid_p)
696 if (expld.phase != lang_mark_phase_enum)
697 einfo (_("%F%S invalid assignment to location counter\n"));
699 else if (expld.dotp == NULL)
700 einfo (_("%F%S assignment to location counter"
701 " invalid outside of SECTION\n"));
706 nextdot = expld.result.value + expld.section->vma;
707 if (nextdot < expld.dot
708 && expld.section != bfd_abs_section_ptr)
709 einfo (_("%F%S cannot move location counter backwards"
710 " (from %V to %V)\n"), expld.dot, nextdot);
714 *expld.dotp = nextdot;
719 memset (&expld.result, 0, sizeof (expld.result));
723 struct bfd_link_hash_entry *h = NULL;
725 if (tree->type.node_class == etree_provide)
727 h = bfd_link_hash_lookup (link_info.hash, tree->assign.dst,
730 || (h->type != bfd_link_hash_new
731 && h->type != bfd_link_hash_undefined
732 && h->type != bfd_link_hash_common))
734 /* Do nothing. The symbol was never referenced, or was
735 defined by some object. */
740 exp_fold_tree_1 (tree->assign.src);
741 if (expld.result.valid_p)
745 h = bfd_link_hash_lookup (link_info.hash, tree->assign.dst,
748 einfo (_("%P%F:%s: hash creation failed\n"),
752 /* FIXME: Should we worry if the symbol is already
754 lang_update_definedness (tree->assign.dst, h);
755 h->type = bfd_link_hash_defined;
756 h->u.def.value = expld.result.value;
757 h->u.def.section = expld.result.section;
758 if (tree->type.node_class == etree_provide)
759 tree->type.node_class = etree_provided;
770 memset (&expld.result, 0, sizeof (expld.result));
776 exp_fold_tree (etree_type *tree, asection *current_section, bfd_vma *dotp)
780 expld.section = current_section;
781 exp_fold_tree_1 (tree);
785 exp_fold_tree_no_dot (etree_type *tree)
789 expld.section = bfd_abs_section_ptr;
790 exp_fold_tree_1 (tree);
794 exp_binop (int code, etree_type *lhs, etree_type *rhs)
796 etree_type value, *new;
798 value.type.node_code = code;
799 value.binary.lhs = lhs;
800 value.binary.rhs = rhs;
801 value.type.node_class = etree_binary;
802 exp_fold_tree_no_dot (&value);
803 if (expld.result.valid_p)
804 return exp_intop (expld.result.value);
806 new = stat_alloc (sizeof (new->binary));
807 memcpy (new, &value, sizeof (new->binary));
812 exp_trinop (int code, etree_type *cond, etree_type *lhs, etree_type *rhs)
814 etree_type value, *new;
816 value.type.node_code = code;
817 value.trinary.lhs = lhs;
818 value.trinary.cond = cond;
819 value.trinary.rhs = rhs;
820 value.type.node_class = etree_trinary;
821 exp_fold_tree_no_dot (&value);
822 if (expld.result.valid_p)
823 return exp_intop (expld.result.value);
825 new = stat_alloc (sizeof (new->trinary));
826 memcpy (new, &value, sizeof (new->trinary));
831 exp_unop (int code, etree_type *child)
833 etree_type value, *new;
835 value.unary.type.node_code = code;
836 value.unary.child = child;
837 value.unary.type.node_class = etree_unary;
838 exp_fold_tree_no_dot (&value);
839 if (expld.result.valid_p)
840 return exp_intop (expld.result.value);
842 new = stat_alloc (sizeof (new->unary));
843 memcpy (new, &value, sizeof (new->unary));
848 exp_nameop (int code, const char *name)
850 etree_type value, *new;
852 value.name.type.node_code = code;
853 value.name.name = name;
854 value.name.type.node_class = etree_name;
856 exp_fold_tree_no_dot (&value);
857 if (expld.result.valid_p)
858 return exp_intop (expld.result.value);
860 new = stat_alloc (sizeof (new->name));
861 memcpy (new, &value, sizeof (new->name));
867 exp_assop (int code, const char *dst, etree_type *src)
871 new = stat_alloc (sizeof (new->assign));
872 new->type.node_code = code;
873 new->type.node_class = etree_assign;
874 new->assign.src = src;
875 new->assign.dst = dst;
879 /* Handle PROVIDE. */
882 exp_provide (const char *dst, etree_type *src, bfd_boolean hidden)
886 n = stat_alloc (sizeof (n->assign));
887 n->assign.type.node_code = '=';
888 n->assign.type.node_class = etree_provide;
891 n->assign.hidden = hidden;
898 exp_assert (etree_type *exp, const char *message)
902 n = stat_alloc (sizeof (n->assert_s));
903 n->assert_s.type.node_code = '!';
904 n->assert_s.type.node_class = etree_assert;
905 n->assert_s.child = exp;
906 n->assert_s.message = message;
911 exp_print_tree (etree_type *tree)
913 if (config.map_file == NULL)
914 config.map_file = stderr;
918 minfo ("NULL TREE\n");
922 switch (tree->type.node_class)
925 minfo ("0x%v", tree->value.value);
928 if (tree->rel.section->owner != NULL)
929 minfo ("%B:", tree->rel.section->owner);
930 minfo ("%s+0x%v", tree->rel.section->name, tree->rel.value);
933 fprintf (config.map_file, "%s", tree->assign.dst);
934 exp_print_token (tree->type.node_code, TRUE);
935 exp_print_tree (tree->assign.src);
939 fprintf (config.map_file, "PROVIDE (%s, ", tree->assign.dst);
940 exp_print_tree (tree->assign.src);
941 fprintf (config.map_file, ")");
944 fprintf (config.map_file, "(");
945 exp_print_tree (tree->binary.lhs);
946 exp_print_token (tree->type.node_code, TRUE);
947 exp_print_tree (tree->binary.rhs);
948 fprintf (config.map_file, ")");
951 exp_print_tree (tree->trinary.cond);
952 fprintf (config.map_file, "?");
953 exp_print_tree (tree->trinary.lhs);
954 fprintf (config.map_file, ":");
955 exp_print_tree (tree->trinary.rhs);
958 exp_print_token (tree->unary.type.node_code, FALSE);
959 if (tree->unary.child)
961 fprintf (config.map_file, " (");
962 exp_print_tree (tree->unary.child);
963 fprintf (config.map_file, ")");
968 fprintf (config.map_file, "ASSERT (");
969 exp_print_tree (tree->assert_s.child);
970 fprintf (config.map_file, ", %s)", tree->assert_s.message);
974 if (tree->type.node_code == NAME)
976 fprintf (config.map_file, "%s", tree->name.name);
980 exp_print_token (tree->type.node_code, FALSE);
982 fprintf (config.map_file, " (%s)", tree->name.name);
992 exp_get_vma (etree_type *tree, bfd_vma def, char *name)
996 exp_fold_tree_no_dot (tree);
997 if (expld.result.valid_p)
998 return expld.result.value;
999 else if (name != NULL && expld.phase != lang_mark_phase_enum)
1000 einfo (_("%F%S nonconstant expression for %s\n"), name);
1006 exp_get_value_int (etree_type *tree, int def, char *name)
1008 return exp_get_vma (tree, def, name);
1012 exp_get_fill (etree_type *tree, fill_type *def, char *name)
1021 exp_fold_tree_no_dot (tree);
1022 if (!expld.result.valid_p)
1024 if (name != NULL && expld.phase != lang_mark_phase_enum)
1025 einfo (_("%F%S nonconstant expression for %s\n"), name);
1029 if (expld.result.str != NULL && (len = strlen (expld.result.str)) != 0)
1033 fill = xmalloc ((len + 1) / 2 + sizeof (*fill) - 1);
1034 fill->size = (len + 1) / 2;
1036 s = (unsigned char *) expld.result.str;
1044 digit = (digit - 'A' + '0' + 10) & 0xf;
1058 fill = xmalloc (4 + sizeof (*fill) - 1);
1059 val = expld.result.value;
1060 fill->data[0] = (val >> 24) & 0xff;
1061 fill->data[1] = (val >> 16) & 0xff;
1062 fill->data[2] = (val >> 8) & 0xff;
1063 fill->data[3] = (val >> 0) & 0xff;
1070 exp_get_abs_int (etree_type *tree, int def, char *name)
1074 exp_fold_tree_no_dot (tree);
1076 if (expld.result.valid_p)
1078 expld.result.value += expld.result.section->vma;
1079 return expld.result.value;
1081 else if (name != NULL && expld.phase != lang_mark_phase_enum)
1082 einfo (_("%F%S non constant expression for %s\n"), name);
1088 align_n (bfd_vma value, bfd_vma align)
1093 value = (value + align - 1) / align;
1094 return value * align;